We played Conan 2d20 online awhile back. From what I recall, we marked out zones on the map. Don't recall the exact zones now, but characters adjacent were in melee, in the same zone, close, one zone away far, etc. What ever they are in 2d20 again.

We recently tried Daggerheart Beta. They also use zones, but sugest for mor tactile combat, melee is 5 feet, very close is 5 to 10 feet, close is 10 to 30 feet, far is 30-100feet(something like that),, very far is 100+ feet